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Question on Link Aggregation benefits


Question on Link Aggregation benefits

HI all, I am thinking about setting up Link Aggregation between AX6000/RBK852 and CM1100 on a 1 Gb Comcast line. I have done a lot of reading, but there is one thing I am still confused about. The CM1100 has 2 ethernet ports that can be passed into the RBR850 router, yet the CM1100 is pulling data on just one 1 GB line from Comcast.


So if I get ~ 940 Mb/s on the Comcast line, does Link Aggregation cause more than the 940 Mb/s to be pulled, or (more likely I think) is it that a single device won't get any faster performance with or without Link Aggregation, but multiple devices will in aggregate get more performance in Mb/s compared to the same system set up without Link Aggregation? In other words it enhances bandwith to a group of devices (effectively giving each device higher performance due to less data contention), it doesn't offer any higher performance to a single device if running by itself?


Thanks for confirming this or setting me straight!

Message 1 of 4

Re: Question on Link Aggregation benefits

Potentially it'll let the router have access to >1gig speeds if your isp overprovisions you.

But since the ports are just 1 gig for the other devices hardwired in, they won't get any faster speed. 

But it'll allow an aggregate speed of faster than a gig (multiple devices combined) again if you're overprovisioned. 


some people have had instability running port aggregation. I struggled with stability running port aggregation using a cm1100 and an arris sb8200 so it wasn't worth it as rarely do you need speeds in excess of 1 gig. 

But again, that was only some people. Others it works fine for. all you can do is try it and see how well it works for you. 




Current setup: CAX80->Trendnet TEG-S380->GS716T-> RBK752->pi-hole
1.4gig download/50mbps upload
We’re members of the public helping out on our own time.
Message 2 of 4

Re: Question on Link Aggregation benefits


My Setup ISP SparkLight | Internet Cable 1000↓/50↑ CM2000 Modem | Wifi Router RAXE50 and R8500(v.158) Router Mode and RBK752(v.2) AP mode | Switches NG GS105/8 | 

Additional NG HW: C7800/CM1100/CM1200/CM2000, Orbi: CBK40, CBK752, RBK50, RBK853, RBK752, RBK953, SXK30 | NightHawk: R7000, R7800, R7960P, R8000, R8500, RAXE500, RAX50, XR450, EX7500/EX7700, GS308v3

Message 3 of 4

Re: Question on Link Aggregation benefits

Thank you @plemans !!!!

Message 4 of 4
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